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2008-10-15x86: pvclock: fix shadowed variable warningHarvey Harrison
arch/x86/kernel/pvclock.c:102:6: warning: symbol 'tsc_khz' shadows an earlier one include/asm/tsc.h:18:21: originally declared here Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-15KVM: don't enter guest after SIPI was received by a CPUGleb Natapov
The vcpu should process pending SIPI message before entering guest mode again. kvm_arch_vcpu_runnable() returns true if the vcpu is in SIPI state, so we can't call it here. Signed-off-by: Gleb Natapov <gleb@qumranet.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-15KVM: x86.c make kvm_load_realmode_segment staticHarvey Harrison
Noticed by sparse: arch/x86/kvm/x86.c:3591:5: warning: symbol 'kvm_load_realmode_segment' was not declared. Should it be static? Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-15KVM: switch to get_user_pages_fastMarcelo Tosatti
Convert gfn_to_pfn to use get_user_pages_fast, which can do lockless pagetable lookups on x86. Kernel compilation on 4-way guest is 3.7% faster on VMX. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-15KVM: Device Assignment: Free device structures if IRQ allocation failsAmit Shah
When an IRQ allocation fails, we free up the device structures and disable the device so that we can unregister the device in the userspace and not expose it to the guest at all. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-15KVM: Device Assignment with VT-dBen-Ami Yassour
Based on a patch by: Kay, Allen M <allen.m.kay@intel.com> This patch enables PCI device assignment based on VT-d support. When a device is assigned to the guest, the guest memory is pinned and the mapping is updated in the VT-d IOMMU. [Amit: Expose KVM_CAP_IOMMU so we can check if an IOMMU is present and also control enable/disable from userspace] Signed-off-by: Kay, Allen M <allen.m.kay@intel.com> Signed-off-by: Weidong Han <weidong.han@intel.com> Signed-off-by: Ben-Ami Yassour <benami@il.ibm.com> Signed-off-by: Amit Shah <amit.shah@qumranet.com> Acked-by: Mark Gross <mgross@linux.intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: Use DstAcc for 'and'Guillaume Thouvenin
For instruction 'and al,imm' we use DstAcc instead of doing the emulation directly into the instruction's opcode. Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: Add cmp al, imm and cmp ax, imm instructions (ocodes 3c, 3d)Guillaume Thouvenin
Add decode entries for these opcodes; execution is already implemented. Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: Add DstAcc operand typeGuillaume Thouvenin
Add DstAcc operand type. That means that there are 4 bits now for DstMask. "In the good old days cpus would have only one register that was able to fully participate in arithmetic operations, typically called A for Accumulator. The x86 retains this tradition by having special, shorter encodings for the A register (like the cmp opcode), and even some instructions that only operate on A (like mul). SrcAcc and DstAcc would accommodate these instructions by decoding A into the corresponding 'struct operand'." -- Avi Kivity Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15x86: Move FEATURE_CONTROL bits to msr-index.hSheng Yang
For MSR_IA32_FEATURE_CONTROL is already there. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Rename IA32_FEATURE_CONTROL bitsSheng Yang
Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: fix jmp r/m64 instructionAvi Kivity
jmp r/m64 doesn't require the rex.w prefix to indicate the operand size is 64 bits. Set the Stack attribute (even though it doesn't involve the stack, really) to indicate this. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Cleanup stalled INTR_INFO readJan Kiszka
Commit 1c0f4f5011829dac96347b5f84ba37c2252e1e08 left a useless access of VM_ENTRY_INTR_INFO_FIELD in vmx_intr_assist behind. Clean this up. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86: unhalt vcpu0 on resetMarcelo Tosatti
Since "KVM: x86: do not execute halted vcpus", HLT by vcpu0 before system reset by the IO thread will hang the guest. Mark vcpu as runnable in such case. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: Add call near absolute instruction (opcode 0xff/2)Mohammed Gamal
Add call near absolute instruction. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86: do not execute halted vcpusMarcelo Tosatti
Offline or uninitialized vcpu's can be executed if requested to perform userspace work. Follow Avi's suggestion to handle halted vcpu's in the main loop, simplifying kvm_emulate_halt(). Introduce a new vcpu->requests bit to indicate events that promote state from halted to running. Also standardize vcpu wake sites. Signed-off-by: Marcelo Tosatti <mtosatti <at> redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: Add in/out instructions (opcodes 0xe4-0xe7, 0xec-0xef)Mohammed Gamal
The patch adds in/out instructions to the x86 emulator. The instruction was encountered while running the BIOS while using the invalid guest state emulation patch. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Add statistics for guest irq injectionsAvi Kivity
These can help show whether a guest is making progress or not. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Modify kvm_shadow_walk.entry to accept u64 addrSheng Yang
EPT is 4 level by default in 32pae(48 bits), but the addr parameter of kvm_shadow_walk->entry() only accept unsigned long as virtual address, which is 32bit in 32pae. This result in SHADOW_PT_INDEX() overflow when try to fetch level 4 index. Fix it by extend kvm_shadow_walk->entry() to accept 64bit addr in parameter. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: Add std and cld instructions (opcodes 0xfc-0xfd)Mohammed Gamal
This adds the std and cld instructions to the emulator. Encountered while running the BIOS with invalid guest state emulation enabled. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: add MC5_MISC msr read supportJoerg Roedel
Currently KVM implements MC0-MC4_MISC read support. When booting Linux this results in KVM warnings in the kernel log when the guest tries to read MC5_MISC. Fix this warnings with this patch. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: SVM: No need to unprotect memory during event injection when using nptAvi Kivity
No memory is protected anyway. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Fix setting the accessed bit on non-speculative sptesAvi Kivity
The accessed bit was accidentally turned on in a random flag word, rather than, the spte itself, which was lucky, since it used the non-EPT compatible PT_ACCESSED_MASK. Fix by turning the bit on in the spte and changing it to use the portable accessed mask. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Flush tlbs after clearing write permission when accessing dirty logAvi Kivity
Otherwise, the cpu may allow writes to the tracked pages, and we lose some display bits or fail to migrate correctly. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Add locking around kvm_mmu_slot_remove_write_access()Avi Kivity
It was generally safe due to slots_lock being held for write, but it wasn't very nice. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Account for npt/ept/realmode page faultsAvi Kivity
Now that two-dimensional paging is becoming common, account for tdp page faults. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: Add mov r, imm instructions (opcodes 0xb0-0xbf)Mohammed Gamal
The emulator only supported one instance of mov r, imm instruction (opcode 0xb8), this adds the rest of these instructions. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Allocate guest memory as MAP_PRIVATE, not MAP_SHAREDAvi Kivity
There is no reason to share internal memory slots with fork()ed instances. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Convert the paging mode shadow walk to use the generic walkerAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Convert direct maps to use the generic shadow walkerAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Add generic shadow walkerAvi Kivity
We currently walk the shadow page tables in two places: direct map (for real mode and two dimensional paging) and paging mode shadow. Since we anticipate requiring a third walk (for invlpg), it makes sense to have a generic facility for shadow walk. This patch adds such a shadow walker, walks the page tables and calls a method for every spte encountered. The method can examine the spte, modify it, or even instantiate it. The walk can be aborted by returning nonzero from the method. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Infer shadow root level in direct_map()Avi Kivity
In all cases the shadow root level is available in mmu.shadow_root_level, so there is no need to pass it as a parameter. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Unify direct map 4K and large page pathsAvi Kivity
The two paths are equivalent except for one argument, which is already available. Merge the two codepaths. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Move SHADOW_PT_INDEX to mmu.cAvi Kivity
It is not specific to the paging mode, so can be made global (and reusable). Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: remove bad ByteOp specifier from NEG descriptorAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86 emulator: remove duplicate SrcImmroel kluin
Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Load real mode segments correctlyAvi Kivity
Real mode segments to not reference the GDT or LDT; they simply compute base = selector * 16. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Change segment dpl at reset to 3Avi Kivity
This is more emulation friendly, if not 100% correct. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Change cs reset state to be a data segmentAvi Kivity
Real mode cs is a data segment, not a code segment. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: make irq ack notifier functions staticHarvey Harrison
sparse says: arch/x86/kvm/x86.c:107:32: warning: symbol 'kvm_find_assigned_dev' was not declared. Should it be static? arch/x86/kvm/i8254.c:225:6: warning: symbol 'kvm_pit_ack_irq' was not declared. Should it be static? Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Use kvm_set_irq to inject interruptsAmit Shah
... instead of using the pic and ioapic variants Signed-off-by: Amit Shah <amit.shah@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: SVM: Fix typoAmit Shah
Fix typo in as-yet unused macro definition. Signed-off-by: Amit Shah <amit.shah@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Modify mode switching and vmentry functionsMohammed Gamal
This patch modifies mode switching and vmentry function in order to drive invalid guest state emulation. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Add invalid guest state handlerMohammed Gamal
This adds the invalid guest state handler function which invokes the x86 emulator until getting the guest to a VMX-friendly state. [avi: leave atomic context if scheduling] [guillaume: return to atomic context correctly] Signed-off-by: Laurent Vivier <laurent.vivier@bull.net> Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Add module parameter and emulation flag.Mohammed Gamal
The patch adds the module parameter required to enable emulating invalid guest state, as well as the emulation_required flag used to drive emulation whenever needed. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Add Guest State Validity ChecksMohammed Gamal
This patch adds functions to check whether guest state is VMX compliant. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Device assignment: Check for privileges before assigning irqAmit Shah
Even though we don't share irqs at the moment, we should ensure regular user processes don't try to allocate system resources. We check for capability to access IO devices (CAP_SYS_RAWIO) before we request_irq on behalf of the guest. Noticed by Avi. Signed-off-by: Amit Shah <amit.shah@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Handle spurious acks for PIT interruptsAvi Kivity
Spurious acks can be generated, for example if the PIC is being reset. Handle those acks gracefully rather than flooding the log with warnings. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: fix i8259 reset irq ackingMarcelo Tosatti
The irq ack during pic reset has three problems: - Ignores slave/master PIC, using gsi 0-8 for both. - Generates an ACK even if the APIC is in control. - Depends upon IMR being clear, which is broken if the irq was masked at the time it was generated. The last one causes the BIOS to hang after the first reboot of Windows installation, since PIT interrupts stop. [avi: fix check whether pic interrupts are seen by cpu] Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Use interrupt queue for !irqchip_in_kernelAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
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